Force and Motion
Work and Energy
by
VIII STD. STUDENT
GOVERNMENT HIGH SCHOOL, VISWANATHAM,
SIVAKASI,
VIRUDHUNAGAR DIST.
To move something by
using force against it.
Examples of Pushing:
Getting out of bed
Knocking a box off a shelf
Opening a can of soda
To move somethingtoward or nearer by
using force.
Examples of Pulling:
Removing a nail from the wall
Lifting a box from the floor
Opening a truck door
Drinking out of a straw
Types of Forces
Muscular force Frictional force Gravitational force (Attractive force) Electric force Magnetic force Nuclear force
Gravitational force (Attractive force)
Motion
Straight line motion Circular motion Uniform motion
Non-uniform motion Oscillatory motion
Non-uniform motion
Oscillatory motion
Work Simple machines Levers
First order Second order Third order
Energy Potential energy Kinetic energy
Chemical energy Light energy
Sound energy Magnetic energy Electric energy
Radiant ElectricalChemical
Thermal Nuclear
Magnetic
Sound
Mechanical
Kinetic Energy Potential Energy
Mechanical energy
Examples of Mechanical Energy
Electrical energy
What type of energy cooks food in a microwave oven?ELECTROMAGNETIC
ENERGY
What type of energy is the spinning plate inside of a microwave oven?
MECHANICAL ENERGY
Electrical energy is transported to your house through power lines.
When you plug an electric fan to a power outlet, electrical energy is transform into what type of energy?
MECHANICAL ENERGY
What energy transformation occurs when an electric
lamp is turned on?
ELECTRICAL ENERGY
ELECTROMAGNETIC ENERGY
Mechanical and Thermal Energy(Don’t forget friction)
Electrical, Mechanical andElectromagnetic Energy
Energy Transfer
Chemical
Electrical
Electrical
Electrical
Sound(mechanical)
Light(Electromagnetic)
ThermalMechanical
Thirumala Tirupati Devasthanam